Discharging device for furnaces



No. 751,720. PATENTED FEB. 9, 1904.

O. I. DAILEY.

DISGHARGING DEVICE FOR FURNACES.

APPLIOATION FILED FEB. 10, 1902.

- N0 MODEL.

miei- JEN/52722.71:

by OkarZes llpaz'lqy,

UNITED STATES Patented February 9, 1904.

PATENT OEEicE.

DISCHARGING DEVICE FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 751,720, dated February9, 1904.

Application filed February 10, 1902. Serial No. 93,342. (No model.)

To all whmn it may concern.-

Be it known that I, OHARLEs I. DAILEY, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga and State of Ohio, haveinvented certain new and useful Improvements in Discharging Devices forFurnaces, of which the following is a specification.

This invention relates to heating-furnaces, and especially to what areknown as continuous-heating furnaces, wherein articles to be heatedsuchas billets, ingots, blooms, or bars of metal or other material areinserted into the cooler charging end of the furnace and forced with abroadside movement in continuous rows toward the hotter delivery end.

The object of my invention is to provide improved means for dischargingsaid heated billets or other articles from the furnace singly or ingroups expeditiously, so as to prevent radiation of heat both from thesaid billets and from the furnace, also to provide such dischargingmeans as may be employed in connection with a separating-hearth withinand a conveyer without the furnace and to reduce the manual laborheretofore required in the efiicient operation of such furnaces.

In my application for patent on improved heating-furnaces filed herewitha swinging ejector is shown and described operating in connection withan inclined plane; but the discharging device herein disclosed does notrequire such inclined plane, and is therefore more positive in itsaction, besides being better adapted to furnaces having a low bed.

In the accompanying drawings, forming a part of this specification, Ihave illustrated the invention as applied to a continuous-heatingfurnace for steel billets, in which Figure I is a plan View showing thedelivery end of a furnace having the roof of one side broken away; andFig. II is a side elevation, the furnace being shown in section on lineII II of Fig. I.

The delivery end only of the furnace is shown in the drawings, theopposite or charging end being of the well-known or any suitableconstruction. In the practice of the invention the side walls, roof, andbed of the furnace inclosing a heating-chamber (indicated by thereference-letter a may also be constructed in any of the usual designsfound suitable to the purpose, and the invention is applicable tofurnaces designed to carry either a single row or a plurality of rows ofbillets.

Resting upon suitable supporting-piers Z) I), elevated somewhat abovethe floor of the heating-chamber of the furnace, is a longitudinal track0 0, upon which the row of billets (Z is supported and pushed along inthe direction indicated by the arrows by any of the wellknownmeans-such, for example, as a hydraulic cylinder and pushing-plate (notshown) located opposite to the entrance-door of the furnace. The ways 00 of the said track are preferably constructed of metal tubes,throughwhich a circulation of cooling fluid may be maintained in order toprotect them from the intense heat. Parallel ofisets are made in theways 0 c, forming a separating-hearth, so that one or more billets, asf, may become separated from the advancing row by gravity and slide downupon the level sections 6 of said ways, as plainly shown in Fig. II.From the separating-hearth e the said ways are con tinued horizontallyout through the dischargedoor it of the furnace to a conveyer 6, thusforming a discharging-section g. I

In the furnace shown herein gas is supplied through the ports at 1' andair through the openings k; but the fuel used, whether gas, oil, orcoal, depends upon the local supply and economical conditions, so thatthe design and proportion of the furnace must necessarily vary indifierent installations. However, in all such furnaces the fuel isburned at the delivery end and the products of combustion carried out ofthe heating-chamber at or near the charging end, and therefore thehottest portion of said chamber is near the delivery end and in theregion-of the separating-hearth 0.

Supported and guided upon suitable beds Z in the fioor of the furnaceand also upon the conveyer 7: is a sliding extractor m, consisting of anapproximately rectangular frame having its furnace end bent upward inthe form of a hook. Said extractor m is preferably constructed of heavypipe bent to the proper shape or cast hollow of metal, so that coolingliquid may be circulated through it to protect it from the heat of thefurnace. The reciprocation of the extractor may be accomplished by anysuitable means, such as a cylinder 0 and piston and rod 32, as shown,which is the operative means preferred for discharging heavy billets,&c. In the drawings the extractor is shown at a point in its outwardtravel having encountered a billet f lying upon the hearth 6; but in itsnormal or inner position of rest it is extended into the furnace untilits hooked end lies beyond the hearth e and its position at the outerend of its stroke is at the conveyer 2', as indicated by the dottedlines in Fig. 11.

In the operation of the apparatus the articles to be heated, such asbillets (Z, are inserted and pushed along from the cooler charging endtoward the hotter discharging end of the furnace, gradually absorbingheat as they advance until one or more billets fall upon theseparating-hearth a, where said billet may remain any desired length oftime, becoming uniformly heated throughout. Meanwhile the extractorrests at the inner end of its stroke; but when it is reciprocatedoutward its hooked end engages the billet or billets lying upon thehearth e and draws said billet out over the discharging-section 9through the discharge-door of the furnace and onto the conveyer '21,which carries the billet ofi to receive further treatment, while theextractor is returned into the furnace to its normal position. Thus isthe billet quickly discharged at the will of the operator and the manuallabor required greatly reduced;

Having described the operation and preferred construction of myinvention as above, what I claim as new, and desire to secure by LettersPatent, is

1. In a heating-furnace, the combination with a heating-chamber andmeans for inserting and advancing a row of billets or other articles tobe heated upon a suitable track therein, of an offset in said trackforming a hearth located in the hotter end of the heating-chamber forseparating by gravity and holding one or more of said billets from saidrow, and a sliding extractor provided with a hook-shaped end adapted todraw said separated billet or billets sidewise from said hearth anddischarge the same from the furnace, substantially as set forth.

2. In a heating-furnace, the combination with a heating-chamber andmeans for inserting and advancing a row of billets or other articles tobe heated upon a suitable track therein, of an offset in said trackforminga hearth located in the hotter end of the heating-chamber forseparating by gravity and holding one or more of the said billets fromsaid row, a horizontal extension of said track passing from said hearththrough the discharge-door of the furnace, and a sliding extractorcomprising a frame provided with a hook-shaped end resting normallybetween the ways of said track under the advancing end of said row ofbillets and adapted to draw billets from said hearth, suitablesupports'and guides for said frame, and meansfor sliding said frame intoand out of the furnace, substantially as set forth.

In testimony whereof I affix my signature, in the presence of twosubscribing witnesses, at New Haven, Connecticut, February 6, 1902.

CHARLES '1. 'DAILEY.

Witnesses:

HELEN C. KEATING, WM. A. WVRIGHT.

